Process of and arrangement for performing mechanical work



Aug. 25, 1931. F. HUBL 1,820,619

PROCESS OF AND ARRANGEMENT FOR PERFORMING MECHANICAL woax Filed March 15, 1930 v 21 18 was) 3'63) I 1 ac Fig.6

Patented Aug. 25, 1931 UNITED STATES PATENT OFFECE FRANZ m'iBL, or WARNSDORF, CZEGHOSLOVAKIA Application filed March 13, 1930, Serial No. 435,667, and in Austria March 13, 1929.

This invention relates to an. improved process of and arrangement for performing mechanical work.

I H'eretofore it has been necessary to con- 5 struct a suitable device or machine (locomotive, motor vehicle, crane, motor plough,

printing machine and so forth) which can perform a certain kind of work only and not any desired kind of work.

By means of the process and arrangement according to the present invention, mechani-' cal work of any kind can be performed, whereby this ability can be increased according to requirement by suitably dimensioning the arrangement and varying the power of the motor used for operating the same.

One mode of carrying out the present invention is illustrated by way of example on the accompanying drawings in which Fig. 1 is an elevation, I

Fig. 2 a plan view, and

Figs. 3, 4, 5, 6 are detail views of a ma chine used, for example, for pattern printmg.

Heretofore the designs (table-cloth, continuous prints and so forth) have been pro duced by hand with the aid of stencils and squirt-devices in that, after the application of the stencil on the article to be provided 3 with the design, the squirt-gun or device is passed by hand over the cut out parts of the stencil, thereby applying the design. Of course, the movements carried out by hand had to follow the designs and in most cases are so complicated that it practically seems to be impossible to exactly copy this kind of work in mechanical manner. According to the present invention this kind of work can be carried out mechanically in the case of any desired design in a most simple manner by providing a device which guides the squirtdevice following the design on the shortest track or path and periodically repeats this operation in accordance with the repeated appearance of the design. The device can be readily and quickly changed to any design with a quite different path of movement.

The device is provided with a top arm- 2 and a bottom arm 3 in order to be able to move across the stencil 1. The tool (for instance the squirt-device) is fixed to the holder 4, while the top arm 2'and the bot tom arm 3 are pivotally secured to the elbow joint 5. j Further the top arm2 is movably mounted on a vertically disposed shaft 6, which rests in bearings 7. A'segmentshaped worm wheel 8 is keyed to the shaft 6. Another segment-shaped worm wheel 9 is loosely mounted on this shaft between adjusting rings 10. The worm wheels .8 and 9 mesh with worm 8 and 9 respectively, provided with coupling-claws 8 '9 respectively and which are mounted to rotate loosely on the shafts 12 and13 respectively. With the shafts 12 and 13 respectively, are keyed sleeves 12 and 13 with couplingclaws 12 and 18 respectively rotating with their shafts and enabled to be brought into engagement and out of engagement with the corresponding coupling-claws 8 9 of the worms 8 and 9 respectively by means of main levers M. A sleeve 14 is mounted looseon the top shaft 12 and provided with a toothed Wheel 15 and coupling-claws 14 A second sleeve 17 provided with couplingclaws'17 and a toothed wheel 18 is mounted on the shaft 12 opposite the sleeve first mentioned. 'A sleeve 20, provided on both front faces with coupling-claws 20 -is keyed on the shaft 12 and is enabled by aXial'movement, to be'brought into or out of engage ment' with one of the opposite coupling, claws 14 and 17*, by means of the control lever 27,'mounted in bearings 28.

The shaft 13 is provided with sleeves 14 and 17 bearing toothed wheels 15" and 18 respectively and further coupling-claws 14 17 sleeve 20 provided on both front faces with coupling-claws 2O is keyed to the shaft 13 and enabled, by axial movement tobe brought into or out of engagement with one oftheopposite coupling-claws 14r and 17" of the sleeves 14 and 17 respectively. The arrangement of these parts is the same as described with reference to the shaft 12, with the exception that bevel-wheels 21 are fixed to the inner faces of the toothed wheels 15 and 18 and mesh with a common bevel-wheel 21 The rotation of the operating motor 22 is transmitted to the couplingsleeve 14 by means of the gear-wheels 23 and 15, and to the shaft 13 by means of the wheel 15 which meshes with the wheel 15. By means of the bevel-wheels 21, 21 the rotation in the op posite way is transmitted to the other wheel and coupling sleeves 17, 18 and 17 18 respectively, so that on each worm-shaft the two coupling sleeves rotate in the opposite direction. If the coupling sleeve 20 (or 20 by axial movement is engaged with the one or with the other of the corresponding op posite coupling sleeves, the worm of the corresponding shaft (12 or 13) rotates in the one or in the other direction e. g. the top arm or the bottom arm is rocked to the right or left hand side. The rotation of the bottom worm wheel 9 is transmitted to the link 24 to the bottom arm 3, the said link being pivoted at 26 to said arm 3 and at 25 to the segment-shaped worm wheel 9 in such a manner, that any adjustment of the two segmerit-shaped worm wheels is transmitted to the bottom arm 3.

The coupling-sleeve 20 and 20 can be moved as already mentioned into and out of engagement by means of levers 27 which are mounted rotatable at 28 and maintained by springs 29 in the central position of rest, so that no coupling is engaged and the top arm as Well as bottom arm remain at rest. At both sides of the levers 27, which also operate as magnet-armature, are arranged electromagnets 30, 31 and 32, 33 respectively. If the motor runs and one of the magnets is excited he attracts the coupling lever 27 and thereby brings in engagement the corresponding worm gear with one ofthe two sleeves (14, 17 or 14*, 17 thus rocking the arms 2, 3.

By alternately closing the circuit and thus alternately exciting the electro-magnets the worm-gears can be operated in such a manner, that the squirt-device 34 moves through a certain path.

In order that the squirt-device moves in a certain path according to the design which is sprayed itis necessary, to move the squirt by hand in the path to be taken, whereby all movements are noted. The diagram thus obtained is then converted into a steeringdiagram for repeating the movements of the squirt device, effected by hand.

The arrangement for carrying out this object consists of two slides 35, 36 which by means of connecting rods r, r. and links 37, 38 are connected with the two segmentshaped worm wheels 8, 9 and thereby with the top arm 2 and with the bottom arm 3 respectively. The slides 35, 36 are guided in two plates 39, 40 and each of the slides carries nipping contacts, hereinafter described and shown in Figs. 3 and 4 on an enlarged scale. Below the nipping contacts 41 which can be readily replaced by pencils, passes a paper-strip 43, which runs from the roller 44 and over the surface 42 onto the roller 45 or vice versa.

The worms 8, 9 are moved out of mesh with the wheels 3, 9 and the electro-motor is started, if it is desired to spray a certain design which is repeated periodically. The contacts 41 are replaced by pencils and a paper-strip is passed through the machine. Now the holder 4 with the spraying device 34 is guided in the path of the design cut in the stencil 1 and the stencil is squirted for the first time. Thereby according to the movements of the arms 2, 3 and by means of the levers 35, 36, the pencils draw curves K, K on the paper-strip 43. Now if the pencils are replaced by the nipping contacts 41 and the worms 8, 9 are placed in mesh with the wheels 8, 9, the apparatus can repeatedly carry out the same movements of the spraying device 34 by guiding this device in the same path, provided the strip is out along the curves K, K, so as the nipping contacts can work as described hereinafter. Thereby a certain width (zone) of the strip is accorded to each pin (contact) and one nipping contact operates the bottom arm, while the other nipping contact operates the top arm.

Each nipping contact (Figs. 3, 4 and 6) consists of a centrally disposed longer plate spring 47 to which is connected one pole of the source of current 46, while the other pole is connected directly with the magnets 30- 33. The bottom end of the plate-spring 47 terminates in a nipping pin 43, which engages the slot in the strip 43. Now according to the. curvature of the slot in the strip 43, the spring 47 is engaged with the one or the other of the spring-contacts 49, arranged at both sides and provided with platinumpoints 50, so that the corresponding magnet will be excited (see Fig. 6) and operate by means of the corresponding lever 27 the coupling 20 or 20, so that the corresponding arm (2 or 3) is correspondingly rocked and thus shifts its nipping contact 41 by the rods r, 35 or r, 36 respectively until the current circuit is interrupted by the contacts 41 and the springs 29 are disengaged. The needle 48 thus runs in the slot of the strip and thereby controls by way of the magnets and the corresponding arms which immediately follow the current impulses and takes with it the needle 48 and, according to the setting of the contact-points 50 and the nonoperative movements of the spring 47, follows the original more or less exactly.

The strip passes from roller to roller like the ribbon of a typewriter, whereby one roller is driven by the shaft of the motor by way of the gear 52, 53 and the toothed Wheels 51.

If a working period has terminated (a stencil has been sprayed over) either the motor or the movement of the strip is stopped automatically.

In order to again start the arrangement, the stopping device is disengaged for instance by operating a push-button of simple construction.

It is remarked, that the squirt-device can be operated either by a separate electro-magnet at certain places only (above the parts out out of the stencil) which can be effected at a particular zone of the strip by means of a control-slot which is engaged by an immovable nipping contact according to the cut out parts of the stencil and thereby controls the opening and closing of the spraying nozzle, or the squirt device sprays continuously onto the stencil and, just before it reaches the position of rest.

In a squirt-arrangement according to this process either each arm can be provided with one squirt-device only and always only a single stencil is sprayed or the same arm can treat with different colours anumber of stencils arranged behind one another. In the case last mentioned, the control-strip is longer and is furnished with control-slots which in number correspond to the number of stencils and, in place of a squirt-device, the holder 4 carries a revolving nozzle-d evicc or nozzle-fan, whereby either automatically or manually always a nozzle is moved into the position of operation, while the other nozzle moves idle. Also a combined arrangement of a number of mechanically operated holders may be employed. One holder sprays and stops itself after the strip has passed through the length accorded to the first stencil, the second holder repeats the next stencil and disengages the first holder, so that it sprays onto the second stencil. After the termination it is stopped and disengages the other holder, which operates over the next stencil and so forth when, after all stencils have been operated on, a third mechanical arm is disengaged and feeds forward new articles. The process according to the invention is applicable to the most complicated mechanical work if properly organized. For instance three mechanical arms for hand pressure with models can be employed. One arm guides the model, the second arm operates the colouring device, the third arm moves the article to be operated on, or these operations can be carried out by a single arm, which moves not only in a plane but also in the space. In this case a third link has to be provided for instance on the motor-shaft (Fig. 1, 2) and a third worm-gear.

By the construction shown in Figs. 1 to 6 any desired mechanical work can be carried out and repeated periodically. The power of the motor is transmited in the necessary manner by the nipping contacts and couplings, whereby. the nipping contacts are 7 controlled by .an ..influence line, which passes according to themechanical work (path ofmovement)- and is registered on a strip (for instance a paper-strip) in the shape: of a slot, stamping, .grooving orv the like. Q The necessary influence lines are provided on the paper-strip by performing the new work once only, if the device is to be used for another mechanical work in another path of movement. This work is repeated as often as desired, after inserting the suitably slotted (stamped or grooved) strip.

It is quite immaterial whether electrical of hydraulic or pneumatic relays are used the nozzle in the path of the stencil openings,

a pin for recording the path of the steering slots on the film, and means for mechanically coupling the nozzle with the recording pin in order to record the steering slots of the film upon moving the nozzle over the stencil. openings.

2. Apparatus for producing designs upon .cloth comprising a stencil adapted to cover the cloth, a carrier, a spraying nozzle mounted on the carrier adapted to spray liquid into the openings of the stencil, an electromotor to move the carrier and nozzle over the stencil, a film having steering slots therein corresponding to the openings of the stencil, nipping contacts in the circuit of the electromotor engaging the steering slots of the film,

and means for rolling the film up and steer- I ing thereby the electromotor by the nipping contacts so that the nozzle is moved in the path of the stencil openings.

- 3. Apparatus for producing designs upon cloth comprising a stencil adapted to cover the cloth, a carrier, a spraying nozzle mounted on the carrier adapted to spray liquid into the openings of the stencil, an electromotor to move the carrier and the nozzle over the stencil, a film having spraying nozzles therein corresponding to the openings of the stencil, nipping contacts in the circuit of the electromotor engaging the steering slots, means for rolling up the film and steering thereby the electromotor by the nipping contacts so that the nozzle is moved in the path of the stencil openings, and a coupling inter connecting the carrier and the ni ping con tacts for removing the contacts into their inoperative position upon movement of the 5 carrier.

In testimony whereof I afiix my signature.

FRANZ HUBL 

